Author: Aparup Banerjee
MDL-30929 fixed spelling mistake in string.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=605d75a07dca92bf5f34cef0f05b3708d0fa04c3
http://github.com/moodle/moodle/commit/605d75a07dca92bf5f34cef0f05b3708d0fa04c3
+ 2.3 en [upgradestalefiles,core_admin]